Coated tissue paper and method of and means for coating it.



F. III/I. SCHULER. COATED TISSUE PAPER AND METHOD 0F AND MEANS FDRCOATING IT.

APPLICATION FILED DEC. 6, 1920.

Patented Sept. 5, 1922.

Bmw SNN@ Patented Sept. 5, 1922.

UNITED STATES A l. 1,428,064 PATENT OFFICE.

FRANK M. SCHULER, 0F ROSELLE PARK, NEW JERSEY, ASSIGNOR TO ALBERT E.DUBEY, 0F BROOKLYN, NEW YORK.

COATED TISSUE PAPER AND METHOD OF AND MEANS FOR COATING IT.

Application led December 6, 1920. Serial No. 428,814.

To ,all whomit 'may concern:

Be it known that I, FRANK M. SoHULnR, a citizen of the United States,residing at 16 East Colfax Ave., Roselle Park, in the county ot' Unionand State of New Jersey, have invented certain new and usefulImprovements in Coated Tissue Paper and Methods of and Means for CoatingIt, of which the following is a specification` reference being had tothe accompanying drawings.

This invention relates to the art of coating paper, and particularly tothe art of coating tissue paper, such' as is used for making crepepaper.

It has heretofore been found impossible to coat very thin paper,commonly known as tissue paper, with a color on one side of the sheet sothat the sheet would have one color on one side and another color on theopposite side of the sheet for the reason that the color, when it isapplied to this thin paper, tends to run through or permeate the paperimmediately, thereby rendering the paper either all of one color orblotched on the opposite surface of the paper from that upon which thecolor was applied.

The object of this invention is to provide a method by which thin paper,commonly known as tissue paper, may be coated. upon one or both sides asmay be desired, and whereby this coating will remain upon one face ofthe paper entirely and will not pass.

through the body ot the paper sheet and atfect in any way either thebody of the paper sheet or the opposite face of the paper to that onwhich the coating is applied.

A further object is to provide means whereby the paper may be coated onboth sides with different colors without vthese colors in any wayaffecting each other or runnin Anot er object is to provide meanswhereby tissue paper, such as used for forming crepe paper, may becoated on opposite sides with dill'erent colors and then creped.

And a still further object is to provide as an article of manufacture athin paper, commonly known as tissue paper, which has a colored coatingon one or both sides.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Thefigure is a diagrammatic end elevation of a paper coating and crepingmachine einpaper manufacture.

in the drawings. I have shown an appara- Y tus whereby my method may becarried out te produce the coated tissue paper heretofore adverted to..The illustration is largely diagrammatic, as the specific elementsforming the mechanism are well known in the art of I have illustratedfor this purpose a rubber roll, designated 10, which is mounted uponsuitable standards 11 and which is disposed immediately above andpartially dipping into a color pan 12. This color pan contains in itslower portion the color 13, but the rubber roll l() does not extend toor dip into the liquid color in this pan. Also mounted in the standards11 and abovethe roller 10 and in alignment therewith is a steam heatedcreping cylinder or roller 14, illustrated as having the same diameteras the rubber roll 10.

The paper A passes from a stock roll 15 mounted adjacent to thestandards 11, and passes upward and oyer a brass roller 16, and fromthence passes over the face of a color applying roller 17 mounted in anysuitable manner adjacent the entrance end of the color pan 13. Thiscolor applying roller 17, which may be of rubber or of any othersuitable material, dips into the liquid color in the pan 12 and bearsevenly against the under face of the sheet A. The excess liquid color isremoved from the face of the rubber roller 17 by means of a scraper 18urged by a spring 19 into engagement with the face of the roller 17.This roller i7 is mounted in the pan in .any suitable manner and may berotated in any desired way. I do not wish to be limited to a roller asa.

means of applying the color from the pan 12 Y pan 12 adjusted to bringthe roller 17 into a proper contact with the paper to apply the lheatedv roller 14 which constitutes the creping cylinder. Steam may beconducted into the interior of this roll in any suitable and obviousmanner, such as commonly used for heating creping rolls. As the sheet ofpaper' passes around the rollt 14, that face of the sheet to which colorhas been applied is disposed against the face of the roller 14 andanother coating of a different color may be applied to the`outside faceof the paper.

The means for this urpose consists of. a

color pan 26, into which a rubber roller 27 dips, this rubberrollerbeing supported by springs 28. Contacting with the rubber roller27 is a rubber roller 29, and contactin with the rubber roller 29 is arubber ro ler 30, which in turn contacts 4with the` face of the paper,the shaft of the rubber roller 30 being mounted in sliding bearings31furged outward and away from the roller 14 by means of springs 32. Theshaft of the rubber roller 29 is also mounted in sliding bearings 33,and these are shifted byl means of adjusting screws 34 having handles35v whereby the screws may be rotated, these screws engaging with asuitable nut on the bearing for the rubber roller 29 -or with a fixednut through which the screws pass, in

any case providing for an adjustment of the roller 29 toward or from theroller 30.

It will be obvious that when the roller 29 is shifted toward the rolle30, it will force this roller 30, against th action of the spring 32,.toward the face of the paper which passes over the steam heated crepingroller 14. The spring 28 will act to force the roller 27 up against theroller 29. A scraper 36 bears against the roller 30 and is urged intocontact therewith by a spring 37 so as to scrape off excess color, andthis excess color drops onto a drip trough or drip plate 38 whichreturns the excess'liquid to the colorvpan 26.

The paper which has been dampened by the application of color thereto iscarried around the steam heated creping roll to a 4attached to theshaftof the doctor.

point, as illustrated, diametrically opposite to the roll 30 and iscreped by the usual doctor blade 39 whichl bears against the Xface of\the roller 14 and is urged thereagainst bv a weight 40 mounted upon anarm 41 This shaft of the doctor 39 is mounted in slidable bearings 42adjusted by means of an adjusting screw 43. The action of the doctorblade 39 is exactly the same as in all creping machines. It acts toobstruct the forward passage of the dampened paper, which adheres to theface of the steam heated creping roller` 14, and Ithus acts to fold orwrinkle this paper transversely of its path of movement. This wrinkledpaper, after it passes from the doctor blade, is carried over i y gespec'onto an endless carrier 44 mountedupon. rollers 45 driven inanysuitable manner,

and from the endless carrier it .passes onto Ia g drying drum 46,onwhich it is dried, and

then -is carried off over a roller 47 by any suitable means(i as by theendless carrier 44.l

The drying rum may be mounted and driven in any suitable manner. r.

` The mechanism .whih I have described will coat one face-of a sheet oftissue paper with one color and' then coat the opposite face of thesheetwith another color, but this is accomplished only by using a particularsize mixed with the color and by the use of heat in the steam heatedcreping roller. I

have discovered that in order to coat tissue Y.

paper on 'one or both sides Without this 1 coating running through thepaper` web and covering the opposite face of the web to that on whichthe coating is applied, it is necessary that the color to be appliedshould be mixed with gelatin and that this coating shall be quicklydried, and with the colors and gelatin there should be mixed a certainamount of salt and that if this be done, very thin paper such as iscommonly called tissue paper may be readily coated without the colorrunning through the web of paper.

In order to form the sizing with which the color is mixed,l I dissolve acertain' amount of gelatin in a certain amount of water. I Y

not come in direct contact with the steam, as

the steam would take allv the strength from the gelatin. The dyes orcolors are mixed with water and boiled until the dye or color isthoroughly dissolved in the water and, of. course, 'the variouscolors ordyes require different proportions. The mixing of the solution ofgelatin and the solution .of the dye is accomplished as follows:Acertain amount of water, as for instance 30 gallons of Warm water, isplaced in a vessel or tank. To this is added four gallons of thedissolved gelatin mixture and three gallons of dissolved color or dye.The solutions of the dye and sizing are then thoroughly mixed,

and to this mixture is added one pound 1y. vI have found by' experimentthat other sizing materials, such as animal glue, casein,

dextrine, and gum arabic require a longer time to set, even with theapplication of heat, and that Where other sizings than gelatin are used,even With heat and the use of salt, the color will go through the paper.By using a combination of gelatimsalt and color and submitting thecoated paper to the action of heat, I set the color before it canpossibly pass through the paper.

While I have alluded to the use of gelatin and prefer to use gelatin forthis purpose, it will be understood that I do not Wish to be limited tothe use of gelatin undei' all circumstances, as my invention liesbroadly in the use of any sizing` which is of such a character that Whenapplied to thin or tissue paper, it Will not pass through the same andwill dry or set relatively quickly under the application of heat to thepaper. The gelatin, however. I have found to be the best sizing to beused, as it sets very quickly under the application of heat.

I have referred throughout the specification to the fact that thisprocess is to be used in coating tissue paper, and by tissue paper Imean any paper so thin or of such character that the application ofcolor by the ordinary processes heretofore known to one side of thepaper would' cause the color to permeate the paper to a greater or lessextent. I do not Wish to be limited to the step of creping the paperillustrated, but it Will be noted that Where the paper is creped, thedampness remaining in the paper, after the color has been appliedthereto, is sulicient to cause the paper to be creped properly by thedoctor blade 29 Without the necessity of damping the paper by othermeans. I have found that by my process and apparatus, it is possible tocolor very thin paper such as tissue paper Without the color strikingthrough the paper, and it is possible to apply one color to one side ofthe sheet and another color to the other side of the sheet Without thecolors being in any way blended or affecting each other. It will beund'erstood that this process might also be applied to the coating ofpaper only moderately thin but of such character that the color appliedto one side of the paper, under ordinary methods of printing, wouldstrike through the other side of the paper.

lVhile I have illustrated means for creping the paper, which meanscoacts With the steam heated roll 14. I wish it understood that thepaper Which has been coated With different colors is not necessarilycoated on the roll 14 but that the creping might be done on a separateroll to which the paper was carried from the roll 14.

1. As an article of manufacture, tissue paper of a single thicknesshaving one face of a different color from the opposite face.

2. As an article of manufacture, lt-ssue paper of a single thicknesshaving one face coated with a colored coating, the opposite face beingof a different color from the coated face.

3. As an article of manufacture, a tissue paper Web of a singlethickness having differently colored coatings upon its opposite faces.

4. A method of coating the surfaces of tissue paper Which consists inapplying to one face of the paper a solution of color and a colloidalsizing, and immediately setting the coating by the application of heatthereto.

5. A process of coating tissue paper With color consisting in applying asolution of dye and gelatin to one face of the sheet of tissue paper andapplying heat to the tissue paper to set the coating.

6. A method of applying a color coating to one face of a sheet of tissuepaper consisting in applying a solution of coloring matter, colloidalsizing and salt to one face of the paper and then heating the paper tothereby set the coating.

7 A method of applying a coating of color to a face of a sheet of tissuepaper consisting in applying a solution of gelatin, coloring matter andsalt to one face of the sheet and then heating the paper to set thecoating.

8. A method of applying a colored coating to one face of a sheet oftissue paper consisting in applying a solution of colloidal sizing,coloring matter and salt to one face of the sheet and then passing thesheet around a heated roll.

9. A method of applying color to one face of a sheet of tissue paper andcreping the tissue paper Which consists in applying a solution ofcoloring matter, colloidal sizing and salt to one face of the sheet oftissue paper, carrying the tissue paper around a heated roll andcre-ping the paper as it leaves the roll and before the paper has beencompletely 'dried out.

-10. A method of coating opposite faces of a sheet of tissue paperconsisting in applying a solution including coloring matter and acolloidal sizing to one face of the sheet of tissue paper, carrying thesheet into contact With a heated roll and while it is passing over saidroll applying a solution of colloidal sizing and 'coloring matter to theopposite face of the sheet.

11. A method of coating the opposite faces of a sheet of tissue paperwith coloring matter consisting in passing the sheet of paper around aroll and simultaneously applying to the outside face thereof a solutionof coloring matter, a colloidal sizing and salt,

heated roll with the coated face in contact with the'roll and applying asolution of and around said heated roll.

' .means for applying pan to the outside coloringmatter, colloidalsizing and salt to the outside faceof the sheet as it passes over 12. A.method of coating the faces of a sheet of tissue and creping the sheetconsisting in passing the sheet around a roll andsimultaneously applyingto the outer face thereof a solution of coloring matter, colloidalsizing and salt, carrying said paper into contact with a .heatedrolh thecoated face of the paper being in contact with the roll, applying asolution of coloring matter, salt and colloidal sizing to the outer faseof the paper .as it'passes around said heated roll, and ycreping thepaper as it passes from saidv heated roll at a point where the paper isstill damp.

13. Means for coating tissue paper with color comprising an upper and alower roll, the upper roll being heated` and the lower roll Vbeing incontact with the upper roll, means for guiding the sheet of paper ontothe'lower roll and around the upper roll in a reverse direction, a colorpan disposed below the lower roll having means therein for aplying thecoloring composition to the outer ace of the paper, a second color pandisposed in connection with the upper roll, and color in said last namedface of the paper as it passes over said heated roll.

14. Means for coating tissue paper with color comprising an upper and alower roll, the upper roll being heated and the lower roll being incontact with the upper roll, means for guiding the sheet of paper ontothe lower roll and around the upper roll in a reverse direction, a colorpan disposed bei low the lower roll, a color applying roller associatedwith said pan. and bearing against the paper as it passes onto saidlower roll,

an upper pan associated with the heated roll,

a color applying roller mounted in the upper pan and adapted to bearagainst the paper as it passes over the upper roll, and means forconveying color from the pan to said color applying roller.

15. Means for coating tissue paper with color comprisingl an upper and alower roll, the upper roll being heated and the lower roll being incontact with the upper roll, means for guiding the sheet of paper ontothe lower roll and around the upper roll in a reverse direction, a colorpan mounted vupon the lower roll and vertically adjustable with relationthereto, a roller dipping into the color pan and bearing against thepaper as it passes onto the lower roll and resiliently urged toward thepaper, an upper color p an associated with the upper roller, a rollerdlpopposite. paper with a color wrinkling or creping of heated roll ithe outside face rollers, one bearing against the paper passing oversaid heated roll and the other bearing against the last named roller andagainst the first named roller, and means for adjusting the` rollerstoward or from the paper.

16. An apparatus for simultaneously coating a sheet of paper with colorand creping the paper including a heated roll over which the paperpasses, means for applying a coating composition to one face of thepaper, and means for creping the paper consisting of a doctor bladeobstructing the passage of the paper around said roll and causing thesald paper, the doctor blade being disposed in spaced relation to themeans for applying the coating to the paper.

17. An apparatus for coating tissue paper on its opposite faces withdifferent colored coatings and creping the paper consisting 1n means forapplying a coating to one face of the tissue paper, means for applyingheat to the tissue paper to set the coating, means for applying a secondcoating of coloring matter and sizing'to the opposite face of thepaper,\ means for heatin the paper to dry the coating, and means tenacting to crepe the'paper while the paper is still damp.

1 8. Means for coating tissue paper with color comprising two rolls, oneof said rolls being heated, means for vguiding the sheet of paper ontothe other roll and around the in a reverse direction to its direction ofmovement around the unheated roll, a color pan disposedbelow theunheated roll having means thereon fortransfer ring the colorcomposition to the outer face of the paper, a second color pan disposedin connection with the heated roll, and means for applying color in saidlast named pan to of the paper as it passes over said heated roll.

19. Means for coating tissue paper with color comprising two rolls, oneof said rollsl being heated, the sheet of paper passing over said rolls,means for applying color to one face of the sheet of paper before itpasses onto one of said rolls, and means for applying color to theopposite side of the paper wllilile the paper is passing over the heatedro 20. Means for coating tissue paper with color comprising a.heatedroll over which the paper passes, means for applying color to onesurface of the paper and then carrying the paper to the heated roll withthe colored face of the paper against the heated roll, and means forapplying color to the opposite surface of the paper while the paper isin contact with the heated roll.

In testimony whereof I hereunto affix my signature.

I FRANK M. SCHULER.

